No Straight Edge Head Introduction 无直边封头简介

flat head round edge rivet 平头圆边铆钉

Head Edge Stress 封头边缘应力

sharp edge on screw's head 螺丝头附有利边

spherical head without folded edge 无折边球形封头

Double-edge cleaner head 双边清洁头

head trailing edge 磁头后沿

head leading edge 磁头前沿

The Head hunter's Edge 猎头者的优势

Head straight edge height 封头直边高度